00968498

Component

https://doi.org/10.3141/1859-07

http://scholar.google.com...lton&publication_year=2003

The installation of sound-absorptive materials near the edge of a noise barrier is known to increase its insertion loss. First, scale-model experiments were performed to compare the performance of barriers that have absorptive edge linings with that of linearly extended, rigid uniform barriers and T-shaped barriers. The issue of effective positioning of the sound-absorptive material was also addressed. It was found that in terms of material use, an absorptive treatment was the most effective treatment for reducing the sound level in the shadow zone for a given barrier height. It was concluded that absorptive edge treatments may offer the opportunity to design effective treatments that could be retrofitted to existing barrier installations to improve their effectiveness. Preliminary field measurements were performed near South Bend, Indiana. The performance of an existing barrier was evaluated. Predictions of its performance made using the Federal Highway Administration Traffic Noise Model were verified. An acoustical treatment was added to one vertical edge of the highway noise barrier. The results for the performance of the acoustical treatment measured in the field confirmed the trends of the scale-model laboratory measurements.

This paper appears in Transportation Research Record No. 1859, Sustainability and Environmental Concerns in Transportation 2003.

English

p. 53-64

2003

Transportation Research Record

0309085969

Figures (12) ; References (15) ; Tables (2)

Field tests; Laboratory tests; Noise barriers; Performance; Retrofitting; Scale models; Sound absorption; Sound level

Absorptive edge treatments; Insertion loss

South Bend (Indiana)

Bridges and other structures; Design; Environment; Highways; I20: Design and Planning of Transport Infrastructure

TRIS, TRB, ATRI

Jan 7 2004 12:00AM

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